Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions

From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by ______.

Cleistogamous flowers are ______.

Both chasmogamous and cleistogamous flowers are present in ______.

Pollination by water occurs in ______.

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by ______.

A dioecious flowering plant prevents both ______.

Pollination occurs in ______.

Which of the following pair has haploid structures?

Chief pollinators of agricultural crops are ______.

Anemophily type of pollination is found in ______.

Both chasmogamous and cleistogamous flowers are present in ______.

Even in absence of pollinating agents seed-setting is assured in ______.

Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.

Feathery stigma occurs in ______.

Plants with ovaries having only one or a few ovules are generally pollinated by ______.

Which of the following is not a water pollinated plant?

Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.

Which of these is a condition that makes flowers invariably autogamous?

Heterostyly as a contrivance for cross-pollination is found in ______.